update French translation

* manual/dso.xml.fr: fix some typos

Submitted by: alain B <chbok hotmail.com>,
              Vincent Deffontaines <vincent gryzor.com>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x@157126 13f79535-47bb-0310-9956-ffa450edef68